65565699364 has 81 divisors (see below), whose sum is σ = 128492504049. Its totient is φ = 29252065920.

The previous prime is 65565699259. The next prime is 65565699413. The reversal of 65565699364 is 46399656556.

The square root of 65565699364 is 256058.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1155320100 + 64410379264 = 33990^2 + 253792^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65565699296 and 65565699305.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 580227372 + ... + 580227484.

Almost surely, 2^65565699364 is an apocalyptic number.

65565699364 is the 256058-th square number.

It is an amenable number.

65565699364 is a deficient number, since it is larger than the sum of its proper divisors (62926804685).

65565699364 is a wasteful number, since it uses less digits than its factorization.

65565699364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 229 counting only the distinct ones).

The product of its digits is 157464000, while the sum is 64.

Multiplying 65565699364 by its sum of digits (64), we get a square (4196204759296 = 2048464²).

The spelling of 65565699364 in words is "sixty-five billion, five hundred sixty-five million, six hundred ninety-nine thousand, three hundred sixty-four".